Alan Cox <email@example.com> writes:
> On Wed, 2002-09-18 at 18:27, Eric W. Biederman wrote:
> > Plus I have played with calibrating the TSC with outb to port
> > 0x80 and there was enough variation that it was unuseable. On some
> > newer systems it would take twice as long as on some older ones.
> port 0x80 isnt going to PCI space.
Agreed. It isn't going anywhere, and it takes it a while to recogonize
> x86 generally posts mmio write but not io write. Thats quite measurable.
The difference timing difference between posted and non-posted writes
I can see.
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This archive was generated by hypermail 2b29 : Mon Sep 23 2002 - 22:00:26 EST